In December 2017, Belarus announced the legalization of cryptocurrencies, in particular bitcoin.
Last 2017, public companies that seemingly are not even related to information technology, after the introduction of the blockchain has increased the value of the shares at times!
KYC (know your customer or know your client) 2.
AML (anti-money laundering or anti money laundering)
If the second paragraph, things are much easier for the company (not all jurisdictions requesting it), know your customer, you simply must.
Generally assumed that there are 2 key verification stage (no, it's not a phone, and not email): verification of identity and verification of address.